Perhaps you should try some spelling variations:
"data tracking algorithm" » "data tracking algorithms" (Expand Search), "data training algorithms" (Expand Search), "data making algorithm" (Expand Search), "path tracking algorithm" (Expand Search), "data backing algorithm" (Expand Search), "uav tracking algorithm" (Expand Search)
"element update algorithm" » "element pass algorithm" (Expand Search), "element data algorithms" (Expand Search), "element ipca algorithm" (Expand Search), "element data algorithm" (Expand Search)
"element mesh algorithm" » "element best algorithm" (Expand Search), "element mean algorithm" (Expand Search), "element means algorithm" (Expand Search), "element method algorithm" (Expand Search), "elements mges algorithm" (Expand Search), "element te algorithm" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("element update algorithm") OR ("element mesh algorithm"))) OR ("data tracking algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"element update algorithm\") OR (\"element mesh algorithm\"))) OR (\"data tracking algorithm\"))".
• Removing quotes may allow a broader search: (((( element update algorithm ) OR ( element mesh algorithm ))) OR ( data tracking algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("element update algorithm") OR ("element mesh algorithm"))) OR ("data tracking algorithm"))*.